diff --git a/djx/build.gradle b/djx/build.gradle
--- a/djx/build.gradle
+++ b/djx/build.gradle
@@ -6,14 +6,14 @@ plugins {
 typescript {
     compilerOptions {
         lib = ["es5", "dom", "scripthost", "es2015.promise", "es2015.symbol", "es2015.iterable"]
-        //listFiles = true
+        // listFiles = true
         declaration = true
         strict = true
         types = []
         module = "amd"
         it.target = "es5"
         experimentalDecorators = true
-        noUnusedLocals = true
+        noUnusedLocals = false
         jsx = "react"
         jsxFactory = "createElement"
         moduleResolution = "node"
diff --git a/djx/src/main/ts/tsx.ts b/djx/src/main/ts/tsx.ts
--- a/djx/src/main/ts/tsx.ts
+++ b/djx/src/main/ts/tsx.ts
@@ -114,6 +114,6 @@ export const on = <E extends string>(...
         key: K,
         _descriptor: TypedPropertyDescriptor<(eventObj: EV) => void> | TypedPropertyDescriptor<() => void>
     ): any => {
-        const handlers = eventNames.map(eventName => ({ eventName, handlerMethod: key }))
+        const handlers = eventNames.map(eventName => ({ eventName, handlerMethod: key }));
         target._eventHandlers = target._eventHandlers ? target._eventHandlers.concat(handlers) : handlers;
     };
diff --git a/djx/src/main/ts/tsx/HtmlRendition.ts b/djx/src/main/ts/tsx/HtmlRendition.ts
--- a/djx/src/main/ts/tsx/HtmlRendition.ts
+++ b/djx/src/main/ts/tsx/HtmlRendition.ts
@@ -23,8 +23,7 @@ export class HtmlRendition extends Rendi
     _create(attrs: object, children: any[]) {
         this._element = dom.create(this.elementType, attrs);
 
-        if (children)
-            children.forEach(v => this._addChild(v));
+        children.forEach(v => this._addChild(v));
     }
 
     _getDomNode() {
diff --git a/djx/src/main/ts/tsx/RenditionBase.ts b/djx/src/main/ts/tsx/RenditionBase.ts
--- a/djx/src/main/ts/tsx/RenditionBase.ts
+++ b/djx/src/main/ts/tsx/RenditionBase.ts
@@ -29,6 +29,7 @@ export abstract class RenditionBase<TNod
         }
     }
 
+    /** Renders DOM element for different types of the argument. */
     protected getItemDom(v: any) {
         const tv = typeof v;
 
@@ -39,7 +40,7 @@ export abstract class RenditionBase<TNod
             // nodes are kept as is
             return v;
         } else if (isRendition(v)) {
-            // renditions as instantinated
+            // renditions are instantiated
             return v.getDomNode();
         } else if (isWidget(v)) {
             // widgets are converted to it's markup
@@ -62,9 +63,9 @@ export abstract class RenditionBase<TNod
         }
     }
 
-    /** @deprecated will be removed in 1.0.0, use getDomNode() */
-    getDomElement() {
-        return this.getDomNode();
+    /** Is rendition was instantiated to the DOM node */
+    isCreated() {
+        return this._created;
     }
 
     /** Creates DOM node if not created. No additional actions are taken. */
diff --git a/djx/src/main/ts/tsx/traits.ts b/djx/src/main/ts/tsx/traits.ts
--- a/djx/src/main/ts/tsx/traits.ts
+++ b/djx/src/main/ts/tsx/traits.ts
@@ -107,12 +107,14 @@ export function destroy(target: Node | I
     } else if (isDestroyable(target)) {
         target.destroy();
     } else if (isNode(target)) {
-        const w = isElementNode(target) ? registry.byNode(target) : undefined;
-        if (w) {
-            w.destroyRecursive();
-        } else {
-            registry.findWidgets(target).forEach(destroy);
-            dom.destroy(target);
+        if (isElementNode(target)) {
+            const w = registry.byNode(target);
+            if (w) {
+                w.destroyRecursive();
+            } else {
+                registry.findWidgets(target).forEach(destroy);
+                dom.destroy(target);
+            }
         }
     }
 }
@@ -134,12 +136,14 @@ export function emptyNode(target: Node) 
  */
 export function startupWidgets(target: Node | _WidgetBase, skipNode?: Node) {
     if (isNode(target)) {
-        const w = isElementNode(target) ? registry.byNode(target) : undefined;
-        if (w) {
-            if (w.startup)
-                w.startup();
-        } else {
-            registry.findWidgets(target, skipNode).forEach(x => x.startup());
+        if (isElementNode(target)) {
+            const w = registry.byNode(target);
+            if (w) {
+                if (w.startup)
+                    w.startup();
+            } else {
+                registry.findWidgets(target, skipNode).forEach(x => x.startup());
+            }
         }
     } else {
         if (target.startup)
diff --git a/djx/src/test/ts/view/MyWidget.tsx b/djx/src/test/ts/view/MyWidget.tsx
--- a/djx/src/test/ts/view/MyWidget.tsx
+++ b/djx/src/test/ts/view/MyWidget.tsx
@@ -60,7 +60,7 @@ export class MyWidget extends djbase(Djx
     }
 
     @on("count-inc")
-    _onCounterInc(evt: Event & { detail: number; x?: number; }) {
+    private _onCounterInc(evt: Event & { detail: number; x?: number; }) {
     }
 
     @on("click", "keydown")
diff --git a/djx/src/test/tsconfig.json b/djx/src/test/tsconfig.json
--- a/djx/src/test/tsconfig.json
+++ b/djx/src/test/tsconfig.json
@@ -1,6 +1,7 @@
 {
     "extends": "../tsconfig",
     "compilerOptions": {
+        "noUnusedLocals": false,
         //"rootDir": "ts",
         "rootDirs": [
             "ts",